A) It cannot work at night
B) It can detect a very faint radio signal
C) It can be operated even in cloudy weather
D) It is much cheaper than optical telescope
Correct Answer: A
Solution :
Radio, waves can pass through dust, clouds, fog, etc, in a radio, telescope. It can detect very faint radio signal due to enormous size of its reflector. So it can be used at night and even in cloudy weather.
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